v8binding: Implements an alternative of WindowProxy.[[DefineOwnProperty]].

third_party/WebKit/Source/core/frame/DOMWindow.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DOMWindow_h
 #define DOMWindow_h
 
 #include "bindings/core/v8/Transferables.h"
 #include "core/CoreExport.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowBase64.h"
 #include "core/frame/Frame.h"
 #include "platform/heap/Handle.h"
 #include "platform/wtf/Assertions.h"
 #include "platform/wtf/Forward.h"
 
 namespace blink {
 
 class Document;
 class InputDeviceCapabilitiesConstants;
+class LocalDOMWindow;
 class Location;
-class LocalDOMWindow;
 class MessageEvent;
+class ScriptValue;
 class SerializedScriptValue;
 
 class CORE_EXPORT DOMWindow : public EventTargetWithInlineData,
                               public DOMWindowBase64 {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   ~DOMWindow() override;
 
   Frame* GetFrame() const {
@@ skipping 41 matching lines @@
   DOMWindow* frames() const { return self(); }
 
   DOMWindow* opener() const;
   DOMWindow* parent() const;
   DOMWindow* top() const;
 
   void focus(ExecutionContext*);
   virtual void blur() = 0;
   void close(ExecutionContext*);
 
-  // FIXME: This handles both window[index] and window.frames[index]. However,

[haraken, 2017/04/14 18:50:06]

Did you remove this comment because it's out-dated?

[Yuki, 2017/04/17 05:30:31]

Yes, the comment is out-dated and no longer correct.
|window| and |window.frames| are the same thing in the current spec.

-  // the spec exposes window.frames[index] across origins but not
-  // window[index]...
-  DOMWindow* AnonymousIndexedGetter(uint32_t) const;
+  // Indexed properties
+  DOMWindow* AnonymousIndexedGetter(uint32_t index) const;
+  bool AnonymousIndexedSetter(uint32_t index, const ScriptValue&);
 
   void postMessage(PassRefPtr<SerializedScriptValue> message,
                    const MessagePortArray&,
                    const String& target_origin,
                    LocalDOMWindow* source,
                    ExceptionState&);
 
   String SanitizedCrossDomainAccessErrorMessage(
       const LocalDOMWindow* calling_window) const;
   String CrossDomainAccessErrorMessage(
@@ skipping 29 matching lines @@
   // |window.closed| determinism; having it return 'true'
   // only after the layout widget's deferred window close
   // operation has been performed, exposes (confusing)
   // implementation details to scripts.
   bool window_is_closing_;
 };
 
 }  // namespace blink
 
 #endif  // DOMWindow_h